title: Effect of electron-lattice interaction on the phase separation in strongly correlated electron systems with two types of charge carriers.
abstract: The effect of electron-lattice interaction is studied for a strongly correlated electron system described by the two-band Hubbard model. A two-fold effect of electron-lattice interaction is taken into account: in non-diagonal terms, it changes the effective bandwidth, whereas in diagonal terms, it shifts the positions of the bands and the chemical potential. It is shown that this interaction significantly affects the doping range corresponding to the electronic phase separation and can even lead to a jump-like transition between states with different values of strains.
authors.affiliation: Institute for Theoretical and Applied Electrodynamics, Russian Academy of Sciences, Izhorskaya street 13, Moscow 125412, Russia.
authors.forename: A O
authors.initials: AO
authors.lastname: Sboychakov
authors.forename: A L
authors.initials: AL
authors.lastname: Rakhmanov
authors.forename: K I
authors.initials: KI
authors.lastname: Kugel